A Mesomechanical Modelling of Porous Aluminum under Dynamic Loading : Comparison Experiment-Calculation

Abstract : The purpose of this work is to demonstrate the validity of a model based on a method of homogenization (Mori and Tanaka's method) to study the shock-wave behavior of 8.2% porous aluminum. At low stresses (below 2 GPa), the macroscopic response of this material is influenced by the coupling between matrix plasticity and void collapse under stress triaxiality. The model is validated through the comparison of numerical simulations to an interferometric measurement perfomed during a plate impact test. For this approach, the satisfactory restoration of the experimental profile by the proposed model depends on the physical analysis of local events.
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Submitted on : Wednesday, January 1, 1997 - 8:00:00 AM
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Francis Collombet, S. Bonnan, P. Héreil. A Mesomechanical Modelling of Porous Aluminum under Dynamic Loading : Comparison Experiment-Calculation. Journal de Physique IV Colloque, 1997, 07 (C3), pp.C3-643-C3-648. ⟨10.1051/jp4:19973110⟩. ⟨jpa-00255395⟩

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